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Process for preparing transfer film by blending collagen and carboxy methyl cellulose

A carboxymethyl cellulose and collagen technology, which is applied in the field of collagen-carboxymethyl cellulose blending to prepare membranes, can solve the problems of poor membrane permeability and water vapor permeability, and achieve excellent flexibility and investment. Less, simple process effect

Inactive Publication Date: 2007-01-24
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most polymer materials such as polyurethane are used in the market to prepare the transfer film. The biggest disadvantage is that the transfer film has poor air permeability and water vapor permeability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Embodiment 1, at first get 100 parts of waste chromium scraps and add its weight percentage in the calcium oxide of 3%, then add the industrial pancreatin of waste chromium scraps weight percent 0.1% and the water that can immerse waste chromium scraps at least, in the chromium with thermometer , a stirrer and a three-necked reaction flask with a condensing tube heated up to 80°C and then incubated for 6 hours, separated and concentrated to obtain collagen; secondly, the obtained collagen was formulated into a solution with a weight percentage of 12%, and a weight percentage of 3% The carboxymethyl cellulose solution is mixed with carboxymethyl cellulose: collagen protein weight percentage is 1: 1 ratio, then adds collagen protein and carboxymethyl cellulose mixture weight percentage 1.5% glycerol and 0.02% formaldehyde, Adjust the pH value to 3.5, and after stirring evenly, prepare the blended film at 60°C by salivation method, and dry it in vacuum at a temperature of 6...

Embodiment 2

[0009] Embodiment 2, at first get 100 parts of waste chromium scraps and add its weight percent in the magnesia of 7%, then add the industrial pancreatin of waste chromium scraps weight percentage 0.3% and the water that can immerse waste chromium scraps at least, in the magnesia with thermometer , a stirrer and a three-necked reaction flask with a condenser tube, the temperature was raised to 60°C and then kept for 10 hours, and the collagen was separated and concentrated to obtain collagen; secondly, the obtained collagen was formulated into a solution with a weight percentage of 12%, and a weight percentage of 3% The carboxymethyl cellulose solution is mixed with carboxymethyl cellulose: collagen protein weight percentage is the ratio of 1: 3, then add collagen protein and carboxymethyl cellulose mixture weight percentage 2.0% glycerol and 0.03% pentadiene Aldehyde, adjust the pH value to 8.5, after stirring evenly, prepare the blend film by salivation method at 50°C, and dr...

Embodiment 3

[0010] Embodiment 3, at first getting 100 parts of waste chromium scraps and adding its weight percentage is in the calcium hydroxide of 5%, then add the industrial pancreatin of waste chromium scraps weight percentage 0.2% and the water that can immerse waste chromium scraps at least, in the In the three-necked reaction flask with a thermometer, a stirrer and a condenser tube, the temperature was raised to 90° C. and then kept for 4 hours, separated and concentrated to obtain collagen; secondly, the obtained collagen was formulated into a solution with a weight percentage of 12%, and a weight percentage of 3 % carboxymethyl cellulose solution is mixed with carboxymethyl cellulose: collagen weight percentage is 1: 2 ratio, then add collagen protein and carboxymethyl cellulose mixture weight percentage 2.5% glycerin and 0.03% modified Glutaraldehyde, adjust the pH value to 6, stir evenly, prepare the blended film by salivation method at 30°C, and dry it in vacuum at 40°C; use 50...

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Abstract

The process of preparing transfer film of blended collagen and carboxymethyl cellulose includes the following steps: the first preparing collagen with waste chromium bits, alkaline compound, industrial pancreatin and water through mixing, separating and concentrating; the subsequent mixing the collagen, carboxymethyl cellulose, glycerin and cross-linking agent via stirring and regulating the pH value to 3.5-8.5; preparing blend film through flow casting and vacuum drying; and soaking the blend film in water solution of glycerin and vacuum drying. The present invention can utilize tanning waste resource, and the prepared blended transfer film has excellent flexibility, high air permeability, high water vapor permeability, easy degrading and other advantages.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a method for preparing transfer membrane by blending collagen and carboxymethyl cellulose. Background technique [0002] Leather industry is a traditional industry characterized by high input of raw materials, high consumption and low output. Only 22% to 30% of raw hides for tanning can be turned into leather, while the rest of the raw materials are discarded as solid waste in the process of tanning. Our country produces 1.4 million tons of tanning waste annually, which is a huge amount. Arbitrary stacking, discarding or landfilling will not only occupy the site and pollute the environment, but also its main component - collagen (content above 80%), an excellent functional biopolymer material, cannot be utilized, resulting in a huge waste of resources. waste. [0003] Nowadays, the recycling of waste chromium scraps has attracted people's attention, but th...

Claims

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Application Information

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IPC IPC(8): C08L89/00C08L1/26C08K5/07B05D7/12B05D1/40C14C11/00
Inventor 张美云刘鎏李金宝
Owner SHAANXI UNIV OF SCI & TECH
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